Fuse for high-explosive shells.



I K. H. MOREN.

FUSE FOR HIGH EXPLOSlVE SHELLS. APPLICATION FILED sums. 19'16.

Patented Oct. 1, 1918.

0 44m WWW WW JTTY I are P KARL HUGO MonE'N, on Borons, SWEDEN.

FUSE FOR HIGH-EXPLOSIITE SHELLS.

Specification of Letters Patent.

Patented Oct. 1,1918.

Application filed SeptemberG, 1916. Serial No. 118,661.

' To all whom it may concern:

Be it known that I, KARL HUGO Monr'nv, a subject of the Kingof Sweden, residing at Bofors, Sweden, have invented new and useful Improvements in Fuses for High-Explosive Shells, of which the following is a specification.

This invention relates to fuses for high explosive shells and has for its purpose in the use of very sensitive fuses to prevent the bursting of the shell in the gun or even before its mouth. Such a too early bursting may be caused by several circumstances, for instance by objects in the trajectory of the shell or by the oscillating movement during the rotation, produced by the partial bursting of the shell or the girdle.

According to the present invention the hammer is fixed in the fuse body or any part connected thereto by means of coarse threads or a bayonet clutch and connected to a coilspring which acts to turn the hammer and to disengage it from the fuse body as soon as a locking device is released at the firing of the gun.

In the accompanying drawing two forms of the invention are illustrated. Figure 1 is a longitudinal section of the one form applied to the point of a shell, Fig. 2 a transverse section on the line (6-0 (Fig. 1) and Fig. 3 such a section on the line bb (Fig. 1). Fig. 4 illustrates a longitudinal section of the other form, applied to the base of a shell.

1 is the fuse body and 4 the hammer, which is screwed several turns into the fuse body by means of coarse threads. 8 is a coiled leaf-spring (watch spring), the one end of which is fixed to a pin 7 in the intermediate part 3, screwed into the fuse body, while the other end of the spring is loosely placed in a slot 10 in the hammer 4. When the hammer 4 is screwed into the fuse body 1 this spring is wound up a number of turns greater than and in the opposite direction to the number of turns with which the hammer is screwed into the said fuse body. To prevent the unscrewing of the hammer 4 from its safe position by the action of the spring 8 the said hammer at its former end is connected to a locking device. In the construction illustrated this device consists of a movable ring 5, held by a locking spring 6 and in the position shown in the drawing forming a guide for a number of balls 9, resting partially in recesses 11 in the hammer, and

partially in recesses 13 in the intermediatepart 3 above mentioned.

At the firing the ring 5 and the spring 6 are pressed backward toward the base of the intermediate part 3, so that the balls 9 can be thrown outward by the rotating movement of the projectile. When this projectile has passed the space in which the, powder gases are in action the spring 8 begins to turn the hammer 4 and to release it from the fuse body 1. When the shell later at a suificient distance from the gun hits the ground or some other object the hammer thus can strike against the pin 12 and cause the detonation of the shell in the usual manner.

The modification illustrated in Fig. 4 differs from that one now described only in the manner in which the hammer 4 is connected to the fuse body 1. In place of the threads a bayonet clutch 14 is used, while the spring 4 and the other parts are constructed and arranged in the manner already described.

Having now particularly described the nature of my invention and the manner of its operation, what I claim is:

l. A time fuse for projectiles comprising a fuse body, an intermediate part in said body and spaced from the bottom of said body, said body being formed with a recess and the intermediate part being formed with an opening registering with said recess, a hammer slidably and rotatably mounted in the intermediate part, a stem formed on said hammer and projecting through said opening and into said recess, a coiled spring secured to said intermediate part and said stem and constantly tending to rotate said hammer, locking means formed on said stem and in said recess for normally securing said hammer against sliding movement but adapted to release the same when it is rotated a certain degree, balls carried by said intermediate part and normally locking said hammer against sliding movement, and means biased to a predetermined position for locking said balls in their normal position, said means being movable to a releasing position when the projectile is fired from a gun.

2. A time fuse for projectiles comprisin a fuse body, an intermediate part in said bo y and spaced from the bottom thereof, said body being formed with a recess and the intermediate part being formed with an opening registering with said recess, a hamintermediate part, a stem formed on said hammer and projecting through saidvopen-l balls carried by said intermediate part and normally looking said hammer against slidmg movement, and means biased to a prede- 10" termined position for locking said balls in their normalposition, said means being movable ;to a releasing position When the projectile isfir'ed from a gun; a

In testimony whereof I have signed my name to this specification in the presence of 15 two subscribing Witnesses. V

KARL HUGO MOREN. 'WitnesseS:

R. ENGBURG, NILs PETTERSON.

Copies of this patent may be obtained for live centsi each; by: addressing the "Gommiss1on'e1'- otflatents,

WashingtongJL 0. 

